page_title: List of the Paleozoic life of Montana
section_title: J
hierarchical_section_title: List of the Paleozoic life of Montana / J
caption_attribution_description: English: Reconstructions of the prehistoric cartilaginous fishes Janassa bituminosa and Menaspis armatus, from Permian Europe (C) Stanton F. Fink
context_page_description: This list of the Paleozoic life of Montana contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Montana and are between 541 and 252.17 million years of age.
context_section_description: †Janassa
  †Janassa clarki – type locality for species
  †Joanellia
  †Joanellia lundi
  †Juresania
caption: Restoration of the Carboniferous-Permian ray-like cartilaginous fish Janassa (top and left)
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